diff --git a/prereise/gather/griddata/hifld/data_process/demand.py b/prereise/gather/griddata/hifld/data_process/demand.py
index b0d63ff12..c61c6a0ae 100644
--- a/prereise/gather/griddata/hifld/data_process/demand.py
+++ b/prereise/gather/griddata/hifld/data_process/demand.py
@@ -47,7 +47,7 @@ def assign_demand_to_buses(substations, branch, plant, bus):
     substations["pop_ZIP"] = load_substations["ZIP"].map(zip_assigned_population)
 
     # Assign remaining county population to substations with load already,
-    #   plus the most connected substation in any county without a load substation
+    # plus the most connected substation in any county without a load substation.
     load_subs_from_zips = substations.query("pop_ZIP > 0")
     load_subs_per_county = load_subs_from_zips.value_counts("COUNTYFIPS")
     county_pop = county_data["population"]
@@ -68,8 +68,8 @@ def assign_demand_to_buses(substations, branch, plant, bus):
     distributed_pop = load_subs.groupby("COUNTYFIPS")["pop_ZIP"].sum()
     remaining_pop = county_pop - distributed_pop.reindex(county_pop.index).fillna(0)
     remaining_pop_per_sub = remaining_pop.clip(lower=0) / load_subs_per_county
-    # We may still miss some population, since there may be a county with zero
-    #   substations, but we should cover the vast majority
+    # We may still miss some population, since there may be a county without any
+    # substations, but we should cover the vast majority.
     substations["pop_county"] = load_subs["COUNTYFIPS"].map(remaining_pop_per_sub)
 
     # Translate population to demand